Printing machine



(No M'odel 7 Sheets-S1 1e et 1'.

A. CAMPBELL;

PRINTING MACHINE.

N0.-297,111, Patented Apr. 22, 1884.

INVENTOR:

WITNESSES:

m By his flttomeys,

N4 Pmns mun-litho ra h". wasmn mn. D. c.

Y E B P M O PRINTING MACHINE.

' Patented llll INVENTOR;

By his flttornqys,

WITNESSES:

7 N. Pmns Mulrlhopuptnn WashmglmLjLC.

(No Model.) 7 Sheets-Sheet 3.

A. GAMPBELL.

PRINTING MACHINE. No. 297.111. Patented Apr. 22, 1884.

WITNESSES a N R:

By his flttomeys,

N.PETRS. Pholoillho rauhcn Wnshmglon. 0. c.

(No Model.) 7 Sheets-Sheet 4.

A. CAMPBELL. PRINTING MACHINE.

N0.29'7,111 Patented Apr. 22, 1884.

' I z INVENTOR. WITNESSES. $406M g 1&2

m By his .flftorlwys,

N, PEIERS PhnlaLilIwgnpher, Wasllmg'nlh n. c.

(No Model.) 7 Sheets-Sheet 5.

A. CAMPBELL.

PRINTING MAGHINE;

No. 297,111 Patented Apr. 22, 1884.

I I INVENTO R:

ES: 6 I

WITN E88 7 a; I

By his .Attorneys,

N. FETERS. PhnloLrlhagr-lphcr. Wnslmglon. B. (1'

7 Sheets-Sheet 6.

(No Model.)

A. CAMPBELL.

PRINTING MACHINE. I No. 297,111. Patented Apr. 22, 1884 INVE NTO R: N E88 ES I 7/5) tv /J fl ysfloaa Byln's Attorneys, WW 1 1 N. PETERSvgmmulho n mr. Washington. 0. c,

(No Model.) 7 Sheets-Sheet 7.

A. CAMPBELL.

PRINTING MACHINE.

110. 297,111. Patented Apr. 22, 18.84.

E! i g. 15

l INVENTOR:

@AQQME 1 By his .flttowwys,

N. PETERS. PIIOo-Llllmgmplmr. W-uhinglulk n. c.

UN Tnn STATns PATENT @rrrce.

ANDREW CAMPBELL, OF BROOKLYN, ASSIGNOR TO JOHN AND EDMUND MGLOUGHLIN,BOTH OF NEW YORK, N. Y.

PRINTING-MACHINE.

FJFECIFICATION forming part of Letters Patent No. 297,111, dated April22, 188%.

Application filed July 27, 1883. (No model.) I

To aZZ whom it may concern:

Be it known that I, ANDREW CAMPBELL, a citizen of the United States,residing at Brooklyn, Kings county, New York, have invented certainImprovements in- Printing-Machines,

of which the following is a specification.

My inventionis particularly adapted to cylinderprinting machines orpresses; and the purpose is to effect a perfect or nearly perfectregister.

The invention relates to means for electrically controlling themovements ofthe press or machine, whereby the feeding of the sheet up tothe front and side guides determines or governs the operation of theseveral partsthat is to say, if the sheet be not properly fed to thesaid guides,all the movements of the press eX- cept the rotation of thecylinder and the reciprocation ot'the bed will cease. Thus a sheetcannot be taken into the press except it be first placed in perfectregister. The feeding ot'the sheet up to the front and side guidescloses breaks in an electric circuitat these points, if the sheet becorrectly fed. This,

however, doesnot complete the circuit. There is a break whichis closedmechanically by the movement of the time-wheel of the press. The circuitis now complete, and certain electromagnets are excited, which act,through the O attraction of their armatnres, to remove obstacles whichwouldotherwise prevent the proper operation of the front guides, thegrip pers, the cam-shaft which draws down the cylinder,and through thelatter, the ink-fountain.

5 If the sheet be properly fed, another and independent circuit in whichis placed a bell or annunciator isinstantly completed, which announcesto the operator that the sheet is properly placed. If the hell does notsound,

40 the sheet must be readjustcd..until it does. In the main circuit areplaced electrically actuated fingers, which press upon the. sheet andprevent it from being disturbed by the tremor or jar of the press untilit is seized 5 by the grippers. The mechanical circuitcloser also servesto switch orshunt the circuit, so as to cut out the front guides aninstant before they swing back; otherwise their movement would break thecircuit, which should be maintained intact at this moment.

In the drawings which serve to illustrate my invention, I have shown thesame in the principal figures as applied to an ordinarycylinder-printing press or machine wherein the cylinder makes threerevolutions to one impression; and as such presses are well under stoodI have not deemed it necessary to show all of the mechanism; but as themechanism for drawing down the cylinder of the press is widely separatedfrom the front guides and gripper-actuating mechanism, I have deemed itbest to give an illustrative diagram showing the train of gearsconnecting the parts,and also an illustrative diagram showing thecircuits and the breaks therein.

Figure 1 is the diagram above referred to, showing the train ofgears,830.; and Fig. 2 is the diagram showing the arrangement of the circuits,the breaks therein, the electric generators, and the electro magnets. 7oFig. 3 is aplan of a part of the press or machine, showing the cylinder,the feed-board, and the mechanism for actuating the grippers and frontguides. Fig. 4 is a vertical section taken along the axis of thecylinder on line 4 4 in Figs. 3 and 5. Fig. 5 is a section,substantially on line5 5 in Fig. 3,and looking toward the cylinders; andFig. .6 is a view in the same plane, but looking in the oppositedirection. Fig. 7 is a section taken substantially on line 7 7 in Fig.3, and looking toward the cylinder. Fig. 8 shows the inner face of thetime-wheel. Fig. 9 is an edge view of the front guide, drawn to a largescale. Fig. 10 is a section-alview showing the mechanism for operatingthe detent or finger, and also an edge view of the side guide. Figs. 11and 12 are detached views illustrating the mechanism for controlling therotation of the cam-shaft. Fig. 13 illustrates a modification adapted toa 0 press wherein the cylinder makes one revolution to each impression.

Referring first to Fig. 1, A is the printingcylinder. 1 is the maindriving-shaft; 2, the

drivingpulleys; 3, a wheel with thirty-four 5 .teeth; 4, an intermediatewheel of any size;

and 5, aspur-wheel with one hundred and two teeth on the cylinder-axis.6 is a spur-wheel with one hundred and two teeth, and 7 is a pinion withthirty-three teeth, on the same shaft with wheel 6. 8 is aspur-wheelwith ninety-nine teeth on the camshaft or time-shaft S). This wheel 8meshes with pinion 7, and on shaft 9 is the usual cam which draws downthe cylinder, so that it may make the impression. From this shaft isalso driven the mechanism controlling the ink-supplying mechanism andthe sheet-delivery mechanism. These mechanisms are well known and willrequire no further reference here. I give the number of teeth in thegear-wheels simply to show their relative proportions. Of course thenumber of teeth is notimportant so long as their proper proportions are,maintained. The camshaft 9, which is commonly called the timeshaft,makes one revolution to each impression and to three revolutions of thecylinder. On the cylindenaxis is fixed a pinion, 10, which meshes with awheel, B, which I will call a timewheel, and which makes one revolutionto three of the cylinder. With this briefexplanation of the ordinaryarrangement of the gearing of the press I will now proceed to describemy improvements.

Referring particularly to Figs. 3 to 10, A is the press-cylinder; a, itsaxis mounted in the usual way in the frame of the press. 10 is a pinionon the cylinder-axis, and B is the timewheel mounted rotatively on astud, b, in the main frame. These have been before referred to withreference to Fig. 1.

U is the feedboard, c the bottom-guides, and D D two or more frontguides set on a rock shaft, E, mounted in hearings on the pressframe. Atone side of the feed-board is mounted a side guide, D, which is or maybe constructed the same as the frontguides. Therefore a description ofthe details of one of these will serve for all. These front and sideguides are so constructed that the pressure of the sheet of paperagainst them in feeding makes certain contacts which close breaks in anelectric circuit.

Referring particularly to Figs. 4 and 9, d is aback plate fixed to theshaftE, and to this is hinged at c a front plate, f. g g are twoinsulated metallic points in (2, put into the main electric circuit bythe wires i, forming the same. On the back of the platefis a metallicplate, j, which, when the plate f is pressed back by the sheet of paperbeing fed, is made to contact simultaneously with the points 5/ g. 70 isa light spring which holds the platej normally out of contact with thepoints 9 g, and thus makes a break in the circuit at this point. his anadjusting-screw. The platef might be made of metal and the platej beomitted; but I prefer to employ a plate, j, and to insulate it from Thepoints may be tipped with iridium or not, as desired.

The side guide, D, as before stated, may be constructed like the frontguidej ust descri bed. Its points g g are also 'in the main circuitformed by wires '5 This guide D is, by preference, and for convenience,mounted on the case which contains the electrically-actuated finger,which is also in the main circuit. This will be referred to moreparticularly here inafter.

I will now describe the means employed whereby a magnet in the mainelectric circuit is made to control the swinging movements of the frontguides and the mechanism which actuates the grippers.

I have said that the time-wheel B is mounted on the stud I), and it maybe so mounted; but in practice I prefer to mount it as I will nowdescribe. On the stud b is mounted a disk, B, with along boss, and onthis boss is loosely mounted the wheel B. (See Fig. 4.) As the wheel Bis driven from the cylinder through pinion 10, said wheel will rotate aslong as the cylinder rotates; and if-the disk B be connected to it bothwill, of course, turn together. I provide B with cams for actuating thefront guides, for actuating the grippers, and for mechanically closing abreak in the main electric circuit; and I also provide means whereby theelectric circuit controls the connections of wheel B to disk B. Now, ifB and B be not connected, B will stand still, and consequently themechanism before referred to will not be operated.

F is the grippershaft mounted rotatively in the cylinder. G G are thegrippers mounted on shaft F; and H is the cross-grooved cam on the endof the shaft F, which is engaged by the closing pin or stud to close thegrippers on the sheet. These parts may be ar- "anged in the usual way.

1 represents a tubular socket in a provision on the maiu frame, in whichsocket. is mounted the closing-stud J. This stud is provided with aretractil'ig-slining, Z, which tends normally to withdraw the stud, sothat its operative end will not engage the groove in H, but by pressureon the outer end of the stud the spring Z is compressed and the studprotruded, as in Fig. 4:. In the outer end afstud J is mounted afriction-roller, m, and on the inner face of disk B is a cam, a, (seeFig. 6,) which, when said disk rotates, acts on roller m to protrude thestud at the proper time, and to keep it protruded long enough to closethe grippers.

On the shaft E is secured an arm, K, (see Fig. 7,) which bearsacanrroller, 0, arranged to engage a camgroovc, p. in the face of diskB. \Vhen this roller engages the depressed or operative part .2) of thecam-groove, the front guides, D, are caused to swing back so as to freethe sheet and permit the grippers to seize it.

The means I employ for compelling disk 13 to move with wheel B, and forcontrolling this device or means; electrically, so as to release disk Bfrom B, I will now describe.

()n the inner face of wheel B (see Fig. 8) is a projecting lug. q, andmounted on the outer face of disk B (adjacent to B) is a dog, 9', whichstands, normally, with its free end in the path of lug q, so that when Brotates, said lug will engage the dog, and thus drive B. On the shaft 8,which bears the dog 1', and which rotates in a bearing in the web ofdisk B, is secured an arm, 25, (best seen in Fig. 6,) with a curvedtail. This arm is on the inner side of disk B, the shaft 8 extendingthrough said disk. A spring, a, Fig. 7, keeps the dog 0' normallyuplifted.

L is an electromagnet arranged in the main circuit, and '0 is itsarmature-lever, pivoted at w.

M is a bent or elbow lever, mounted on a fulcrum-screw, w, in the mainframe, and provided with an arm, y, which bears a roller, y, and an arm,2. The roller y projects into the path of the curved tail on arm t, andthe free end of arm 2 swings into the path of 'a hook, a, on the end ofarmature-lever c. A light spring, 1), holds the arm zof lever Mdepressed to the position indicated in dotted lines in Fig. 5 normally;and th retracting-spring 1) holds the armature-lever o in such aposition that its hook takes over or stands over the end of armz, asindicated in the dotted lines.

Now, if the electromagnet L be not excited by the closure of thecircuit, as it will fail to be if the sheet be not properly fed to thefront and side guides, when the rotation of the disk B carries the armit around far enough the curved tail of same will wipe over roller 3 onlever M. This roller cannot yield, however, by reason of the engagementof hook at with arm 2,- consequently arm t will be lifted, and this willfree dog?" from the lug g on the wheel B, and the latter wheel willcontinue to rotate, while disk B will stop. As this disk bears the'camswhich operate the front guide and grippers, these of course will not beoperated. Suppose, however, that the sheet be properly placed and thecircuit properly completed, then the eleetro-magnet L will be excitedand will attract its armature. The hook a on the armature-lever will bedrawn back so as to clear arm 2, and when the tail of arm t wipes overroller y, the latter will be free to yield, and the dog 1 will remain incontact with lug q. B and B will then continue to rotate together, andthe operations of the press will go 011 properly.

In order to avoid a spark at the front and side guides contacts, andalso in order to switch out the front guides from the circuit a momentbefore they fall back, I employ a mechanical circuit-breaking andswitching device, which I will now describe with especial reference toFig. 3. e

In the machineframe, (see Fig. 3,) at some suitable point, is mounted aslide, d, carrying a roller at its end to bear on a cam, c, on the diskB. This I will call a switch-cam. This cam moves the slide in onedirection, and a spring, f, moves it back. On the endof the slide is ametal contact-piece, g, which plays through apertures in threeconductors, h h h", to which are attached the main wires of the circuitand the switch or shunt wire 1'. The latter connects with the conductorh at one end, and, passing the front guides, connects with wire 17,between them and the electric generator. The ends of cam e are inclined,and when the forward end of said cam engages the end of slide d thecontact-piece g is moved along or in far enough to first close a breakin the main circuit by connecting h and h", and then by the continuedmovement of the cam h and h are connected, thus cutting out the frontguides, so that they may move back without breaking the circuit.Thecontact with h is made an instant before the contact with h isbroken, in order to prevent any break in the circuit while switching.

It may be necessary to explain here that the dog 1* on wheel B standsnormally in the path ofthe lug g on wheel B, and the latter wheel willdrive the former until the point is reached where the dog is tripped,whether the breaks in the circuit at the guides be closed or not. Beforethis tripping-point is reached cam 6 will have closed the break in thecircuit at S,

so that if the sheet has been properly placed to the guides the magnetLmay be excited.

I will now describe the means for controlling the movements of thecamshaft 9 with especial reference to Figs.1l and 12, premising that themeans here employed for connecting and disconnecting the camshaft fromthe driver is substantially the same as that employed for disconnectingthe timewheel B from the disk B.

tical.

Mounted fixedly on the cam-shaft is adisk, N, which has a single notch,j, in its periphery, and mounted rotatively on the cam-shaft 9 is thewheel 8, driven from pinion 7. I prefer to mount wheel 8 011theprolonged boss of disk N, as shown in Fig. 12, and to keep it up tothe latter by a nut or set-collar, but this is not essential. The wheel8 bears a pawl, 2., arranged to engage the notch j and to be held inengagement therewith normally by a spring, m. This pawl has a bent orcurved tail, a, the purpose of which will be set forth.

0 is an electro-magnet in the main circuit with magnet L, and capable ofbeing excited simultaneously therewith. This magnet has agravity-armature, P, the lever 0 of which is fulcrumed at 2 and providedat its upper end with a hook, g.

Q is an elbow-lever, pivoted or fulcrumed at r, and provided with twoarms, 8 s. The pendent arm 8 is provided with, or may be provided with,a friction-roller, t, at its free end, arranged in the path of the tailn on the pawl l, and the arm 8 rests normally on a pin, a, with its endunder the hook q on the armature-lever. If the circuit be not closedwhen the tail n of the pawl comes to engage rol-ler t, the hook q willprevent the said roller from yielding, and the pressure of same on thetail of the pawl will lift the latter free from notch The camshaft 9will then cease to revolve, and all the mechanism it drives will ofcourse cease to operate; but if the circuit be com- Indeed, they may beidenpleted the magnet 0 will attract its armature P, the hook q will bewithdrawn, so as to free the end of lever or arm 8, and when the tail ofthe pawl contacts with roller t the latter will be brushed aside and thepawl will re main in engagement with notch j.

In Figs. 11 and 12 I have omitted all extraneous parts; but it must beunderstood that all of the parts shown are properly mounted on the mainframe of the press.

The device just described may also be employed in what are termeddrum-cylinder presses, wherein the cylinder makes but one revolution toeach impression. In this case the cylinder does not rise to permit theform to pass in return, but one portion of the cylinder is less indiameter than that portion which makes the impression. Therefore, tosecure the same result, as above described, I mount the main cylinderloosely on the cylinder-shaft, and employ a mechanism similar tothatlast described for making it fast orloose on its shaft, whereby I amenabled to stop the rotation -of the cylinder itself, and consequentlyall of the mechanism driven from it. This stoppage should heeffeetedjust before the closing of the grippers and after the printingor impression surface has passed the form. In this case no devices areneeded to control the grippers and frontguides other than those incommon use, because the cylinder is itself the medium which controls andoperates them; and indeed it controls all of the functions of the pressexcept the movement of the bed. Therefore, if the cylinder is stoppedfrom rotating, as before stated, all the movements of thepress mustcease except those of the bed. I thus obtain in a press of thischaracter the same general results as those hereinbe fore described fora press of a differentkind.

Referringnowto Figs. 3 and 10, X shows the cases containing the magnetsR,\\'l1ich actuate the stop fingers Y. As these fingers are embodied ina pending application, it will not be necessary for me to describe themfully here. I will say, however, that the magnets It are in the maincircuit with the other magnets Land O. In order to adjust the side guideand the fingers out and in on the feed'board, I provide the flange onbase of the case X with a slot, 1), and employ an attaching-screw, w, asshown in Fig. 3. In order to prevent the sheet from being slipped underthefreelowerend of plate fof guide D when the sheet is fed, I attach tothe base of case X, or it maybe fastened to any part to which f ishinged, a thin plate, .70, (see Fig. 10.) slotted to let the end of fpass through and play freely. This plate is bent down at its outer freeedge, so as to rest and press elastically on the feed-board O. The edgeof the plate :10 may be ground thin, so as to oppose no obstacle to thesheet when fed, and the fact thatthe pendent end offextcnds below theplate will prevent the sheet getting under it.

Before explaining the operation of my device as a whole, I will callattention to Fig.2, wherein are shown the generator and the circuits. Inthis view V represents the electric generator, which maybe a battery ordynamo, i i, the wires forming the main circuit D D, the front guides;D, the side guide; L and O, eleetro-magnets in the main circuit; 13, theswitch wire which cuts out the front guides \V, the sheet of paper onthe feed-board C; X X, the cases containing the magnets R R, whichactuate the fingers Y Y; i i, the wires which form the alarm-circuit,which is independent of the main circuit, and broken only at the frontand side guides; and His an erdi nary electric bell arranged in thiscircuit. I have in this view designated the mechanical circuit-closingand switch device in the main circuit by the letter S,arbitrarily. Thealarmcircuit '5 2 may connect with generator V, or with a separategenerator,as desired. For si mplicity, I have shown it connected with V.This illustrative view shows all the parts clear- 1 y, and from it thearrangement will be readily understood.

I will now describe the operation.

The pressman feeds a sheet, W', up to the front and side guides, D D D.If properly placed, thebreaks in both electric circuits will be closedat these points, and as this completes the alarnrcircuit i i the bell Itwill sound, and the pressman will know that the sheet is properlyplaced. The cam cnowadvances and closes the break in the main circuit(at S in Fig. 2,) which completes this circuit and excites magnets L, O.and It. The func tions performed by magnets L and 0 have been beforedescribed. The magnets R throw down the fingers Y on the sheet andsteady it in its position. The grippers G close down on the sheet; butbefore they grasp it the contact piece 9 moves over far enough to switchthe front guides out of the main circuit, and they move back. \Vhen, bythe continued move ment of cum 6, the contactpiece g is drawn back farenough to break the circuit, the fingers Y rise to their uprightpositions. The bell R continues to ring until the front guides areswitched out, at which time the alarm-circuit i i is, of course, broken.

It is possible to vary the construction ofthe .mechanism I employ almostindefinitely. and

therefore I do not wish to limit myself to the precise constructionshown. In Fig. 13 I have illustrated a modification adapted to a presswherein there is an impression at each revolution of the cylinder. Inthis construction my invention is modified only so far as relates to thecontrol of the mechanism for actuating the front guides and thegrippers.

The time-wheel B is mounted directly on the cylinderaxis a, and bears onits outer face the cam 12 p, for actuating the front guides, and on itsinner face the cam 42, which protrudes the closing-stud J. The latterstud is mounted in a manner similar to that shown in Fig. 4, but has acog-rack, a on the un- IIO der side of its head. J is a similar stud,mounted similar to J, eXcept that its retracting-spring Z is weaker-thanspring I, and its rack (dis on the upper side of its head. T is a slidearranged in a socket between studs J and J, and provided with acog-wheel, b that meshes with the racks on said studs. This slideis-also provided with a roller, M, which bears on cam a. Now, if stud Jbe free to move when cam it strikes roller m", slide T will be driven ina distance equal to the throw of the cam, and stud J will be. driven intwice as far, through the medium of the cog-wheel I), because the springZ is weaker than I, and stud J will remain stationary; but if 'J bestopped from moving, then the action will be reversed, and theclosing-stud J will be protruded far enough to act upon and close thegrippers.

In order that the proper feeding of the sheet to the front and sideguides shall control the movements of the grippers, I provide anelectro-magnet, L, provided with an armature-- lever, 11, which, whenthe magnet is excited by the completion of the circuit, is raised untilits end stands in front of a projection, 0 on the stud J. This willprevent J from being moved as long as magnet L is excited. In order tocontrol the movement of the front guides, I provide the stud J with apin or prolongation, 01 which, when the said stud is not protruded,projects into the path of an arm, e", on the shaft E. Now, if the sheetbe not properly placed and the stud J not protruded,

when the roller 0 on arm K falls into recess of cam 19, the arm 0 willcatch on the pin d and prevent the front guides from receding.

The mechanical device (lettered S as a whole) for closing and switchingthe circuit is in substance the same as that before described, and willrequire no further description, as the letters of reference are thesame.

It is in some cases desirable, particularly in making ready, to renderall the controlling mechanism herein described inoperative. This Iaccomplish by means of a simplc device I-will now describe withreference to Figs. 4, 7, and 8.

On the exterior face of the disk B-that is, the face adjacent to wheelB' -is a stud, 0, with a fiat face. I haveshown it as quadrant shaped incross-section; and mounted rotatively in the web of wheel B is a shaftor rotating arbor, g", which is cut away or halved at its inner end,while on its outer end it bears, or may bear, a crank, r, for rotatingit. When the arbor q is turned, as in Fig. 4, it will not, in therotation of wheel B, touch the stud 0"; but if it be turned a quarter ofthe way round on its axis, its projectinginner end will be in the pathof 0", and it will engage with the latter, and thus compel the wheel anddisk to rotate together. This device, then, is only a means fortemporarily securing B and B together-regardless of the controllingmechanism described; and any suitablemechanism may be employed for thepurpose-as, for example, a pin passed through holes in the webs of thesaid wheel and disk. The disk N and wheel 8 may be provided with asimilar device to compel these parts to rotate together, even when pawlZ is disengaged from notch j.

Having thus described my invention, I claim- 1. In a print-ingniachineorpress, means, substantially as described, whereby the proper placing ofthe sheet up to the front guides closes breaks in an electric circuit,which excites an electro-magnet, which controls the mechanism thatcloses the grippers, substantially as set forth.

2. In a printing machine or press, a front guide constructed in the formof a circuit closer and breaker, and arranged in an electric circuit,substantially as described,whereby the proper placing of the sheetcloses the circuit thereat, for the purposes specified.

3. In a printing machine or press, the combination of mechanism,substantially as described, for actuating the grippers, means,substantially as described, for electrically controlling the operationof said mechanism for actuating the grippers, an electric generator,wires forming the electric circuit, and front guides constructed in theform of circuit closers and breakers, substantially as described,whereby the proper placing of the sheet to the guides closes brcaksintheelectric circuit, and thus controls the operation of the mechanism foractuating the grippers, all arranged substantially as set forth.

4. In a printing machine or press, the combination of mechanism,substantially as described, for actuating the front guides, means,substantially as described, for electrically controlling the operationof said mechanism for actuating the front guides, an electric generator,wires forming an electric circuit, andfront guides constructed in theform of circuit closers and break-ers, substantially as described,whereby the proper placing of the sheet to the guides closes breaks inthe electric circuit, and thus controls the operation of the frontguides, substantially as and for j the purposes set forth.

5. In aprinting machine or press, the combination of means,substantially as described, for rotating the cam-shaft 9, means,substantially as described, for electrically controlling the operationof said mechanism for'rotating the cam-shaft, an electric generator,wires forming the electric circuit, and front guides constructed in theform of circuit closers and breakers, substantially as described,whereby the proper placing of the sheet to the guides closes breaks inthe electric circuit, and thus controls the mechanism for operatingcamshaft 9, substantially as and for the purposes set forth.

6. In a printing machine or press wherein the proper placing of thesheets to the front and side guides electrically controls thegripper-actuating mechanism, each front and side guide constructed inthe form of a circuit closer and breaker, substantially as described,whereby the proper placing of the sheet up to all ofthe guides isnecessary in order to close the breaks in the circuit at the guides,substantially as and for the purposes set forth.

7. In a printing machine or press wherein the proper placing of thesheet to the front guides electrically controls the operation of thepress mechanism, and wherein there is a break in the electric circuit ateach front guide adapted to be closed by the proper placing of thesheet, the combination of a circuit breaking and closing device,substantially as described, arranged at some point in the circuit, andmechanism, substantially as described, arranged to close said break inthe circuit after the breaks at the front guides are closed, and switchor shunt the current before the circuit is broken at said guides bytheir backward movement, whereby a spark at the front guides is avoided,substantially as set forth. 1

8. In a printing machine or press wherein the proper placing of thesheet to. the front guides electrically controls the mechanism foractuating the front guides, an electrical switch constructed andoperated by mechanism, sub stantially as described, arranged to switchthe front guides out of the electric circuit a moment before theywithdraw, whereby the breaking of the circuit consequent on theirwithdrawal will not affect the electrical control of the mechanism,substantially as described.

9. A front or side guide of a printing ma chine or press, comprising aplate, (I, provided with contacts 9 g, a plate, f, hinged thereto, andprovided with a contact, j. and a spring, It, to keep the contactsseparate normally, substantiall y as set forth.

10. The combination, with the side guide, D, constructed substantiallyas shown, of the plate as, provided with a recess to receive the freeend of the plate f of the guide, substan tially as set forth. 7

11. The mechanism for actuating the grip pers, comprising the closingstud and its spring, the disk B provided with the cam 21, the wheel B,provided with the lug q, the shaft 8, bearing arms 1 and t, the lever M,with arms y and z, the magnet L, its lever 7), provided with hook at,and its retraetirig-spring, and the gripper-shaft provided with cam H,all combined and arranged to operate substantially as set forth.

12. The mechanism for actuating the grippers, constructed substantiallyas described, in combination with the front and side guides, constructedsubstantially as described, the electric generator, and thecircuit-wires i,

all constructed and arranged to operate substantially as set forth.

13. The combination of the front guides constructed substantially asdescribed, the generator, the circuit-wires z i and 1, disk B, providedwith cam e, the slide d, contactpiece 9, conductors h if if, and thespring f, all arranged to operate substantially as set forth.

14. A printing machine or press provided with front and side guidesconstructed to form circuitclosers and breakers, substantially asdescribed, and with an electric annnnciatorcircuit containing anelectric annunciator and generator, and arranged to be broken and closedat the said guides, substantially as set forth.

15. The combination, in a printing-press, of the front and side guides,constructed substantially as shown, the generator, the electricannunciator and its circuit having breaks at said guides, the maincircuit with breaks also at said guides, the switch device S,constructed substantially as described, the switch-wire i, theelectro-inagnet L and its armature-lever, the disk B, bearing theoperating-cams and levers r t, the said levers and cams, the lever M,the electro-magnet O and its armature-lever, the lever Q, the disk N,and the wheel 8, provided with a pawl, 7', all constructed and arrangedto operate substantially as set forth.

16. In a printing machine orpress,the front and side guides, D D D,constructed substantially as shown, the electric generator and the wiresof the main circuit, a mechanical circuit-closing device, S, and thefingers Y Y, and their operating mechanism, the magnets which actuatesaid fingers'being in the main' circuit, whereby, when said circuit iscompleted, the fingers will be thrown down, sub stantially as set forth.

17. In a printing machine or press,thecom bination of the time-wheel Band the disk B, the latter. provided with the cams for actuating thegrippers and front guides, with mechanism, substantially as described,controlled by the proper feeding of the sheet to the guides, forcompelling the said disk to rotate with the time-wheel, whereby the saiddisk is compelled to rotate and perform its functions only when thesheet is properly fed, all con structed and arranged to operatesubstantial- 1y as set forth.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

ANDREW CAMPBELL.

Witnesses:

A. G. LOOMIS, S. 0. BROWNELL.

